Skate sharpener



Nov. 1, 1949 Filed July 21, 1947 E. F. IVES 2,486,850

SKATE SHARPENER 2 Sheets-Sheet 1 M u b 25 1b 1 b Nov. 1, 1949 E. F. IVES2,486,350

SKATE SHARPENER.

Filed July 21, 1947 2 Sheets-Sheet 2 A? for/regs Patented Nov. 1, 1949UNITED STATES PATENT OFFICE SKATE SHARI'ENER Edwin Francis Ives,Wallingford, Conn. Application July 21, 1947, Serial No. 7623421 10Claims. 1

The present invention relates in general to skate-sharpening devices andmore especially to a mobile-unit adapted to sharpen ice skates withoutremoving them from the skaters feet.

An object of the invention is to provide a superior ice-skatesharpening-device which may be readily transported to the edge of anice-skating rink or frozen pond and used by the skaters to sharpen theirown skates while the latter are still on their feet.

A further object of the invention is to provide a superior mobileskate-sharpening device which is durable, inexpensive to manufacture,simple to operate and which is designed to sharpen skates accurately toindividual requirements.

With the above and other objects in view as will appear to those skilledin the art from the present disclosure, this invention includes allfeatures in the said disclosure which are novel over the prior art.

In the accompanying drawings, in which certain modes of carrying out thepresent invention are shown for illustrative purposes;

Fig. 1 is a perspective view of the mobile skatesharpening unit of thisinvention shown in conjunction with transporting-means;

Fig. 2 is an enlarged horizontal sectional view of the mobileskate-sharpening unit shown in Fig. 1 with the platform of the unitremoved.

Fig. 3 is an end elevation of the unit shown in Fig. 2 on section line3-3 thereof;

Fig. 4 is an end elevation of the unit of Fig. 2 on section line l4thereof showing by means of broken lines a skate-blade mounted in theblade-supporting means of the device;

Fig. 5 is an enlarged broken plan view of the platform of the unitshowing details of the skateblade guide-means, part of which is brokenaway to show the guard-plates and the latch-means therefor;

Fig. 6 is an end elevation in section of the skate blade guide-meansincluding the guard-plates therefor on section line 6-6 of Fig. 5;

Fig. 7 is an end elevation in section on line 1-4 of Fig. 5 showingdetails of the latch-means of the guard-plates; and

Fig. 8 is a perspective view of one of the bladegripping fingers,detached.

In carrying out the present invention, a mobile skate-sharpening unit isprovided which is indicated generally at Iii in Fig; I and comprises,inbrief, a box-like base-member ll provided with a platform l2 and apair of insulation-covered handrails or hand-holds 1'3, the unit beinggrounded as at 480 a steel-edged runner of the transporting-means,hereinafter described.

When the mobile skate-sharpening unit It is in use, it is preferable tomount the latter on a support which, in the present embodiment,comprises transporting-means M. The latter is made in the form of a sledconsisting of spaced parallel steel-edged runners l5 and a platformsecured tothe top edges of the runners. As shown in the drawings, theplatform consists of a plurality of spaced parallel boards l6 extendingtransversely of the runners, the boards being widely spaced apartadjacent the rear end of the platform to provide tworelatively-widely-spaced parallel recesses FT. Securedto the undersideof the basemember H, as indicated in Fig. 3, and extending transverselyfrom opposite sides thereof, is a pair of spaced parallel feet i9 whichare adapted to engage in the corresponding recesses ll of the platformthereby to firmly but demountably secure the mobileunit on the platformof the transporting-means. Although the sled l4 shown herein is highlysatisfactory, it will be understood that the mobile-unit l0 may bemounted on any other suitable type of transporting-means, either as anintegral or separate unit thereof. Moreover, it should be pointed outthat the transporting-means H of this invention is designed to functionas a crate for shipping the mobileunit Hi the lateral spacing of therunners l5 of the sled being suchv that the mobile-unit may be nestedtherebetween. To this end, the handrails or hand-holds I?- are adaptedto be demountably secured to the mobile-unit so as to be readily removedtherefrom and packed with the sled and mobile-unit for shipping.

Referring more particularly to Figs. 2, 3 and 4, the mobile-unit H! ofthe skate-sharpening device comprises the box-like base-member l lconsisting of a bottom 2-0, to the underside of which the feet 19 aresecured; spaced parallel substantially-vertical side panels 2%, eachprovided with a screened aperture 22- for' the purpose hereinafterdescribed: and substantially-vertical front and rear panels 23, thelatter being fastened by hinges 24 tcron'e of the side panels 2| so asto swing outwardly with respect to the bottom 28 and side panels 2! ofthe base-member H. The latter is preferably wood, whereas the sidepanels and end panels are preferably sheet metal, al though any othermaterials or combinations oi materials may be used. To assist in openingthe end panels, 23, the latter are provided with handles 25.

The top of the base-member H comprises the aforesaid platform I2 whichis preferably wood and substantially equal in width to the width of thebox-like base-member I I, the length of the platform I2 being, however,greater than the length of the base-member II so as to provideoverhanging end-portions 27 each having apertures 28 adjacent the frontand back edges thereof respectively, to accommodate the upper ends of apair of stanchions 29. The latter constitute supporting-means for thedetachable hand-holds I3 and to this end, comprise tubular-memberssecured at their lower ends to the outer ends of the feet I9 of thebase-member, the respective upper ends of the stanchions 29 beingarranged to project up through the aforesaid apertures 28 of theplatform. Secured on the upper ends of the stanchions above the platformI 2, are suitable coupling-sleeves 30 by which the lower ends of therespective hand-holds I3 are adapted-to be detachably secured thereto.

Assembled within the box-like base-member I I is the skate-bladesharpening-means comprising an abrasive wheel 3! secured to the outerfree end of a spindle 32 which is rotatably mounted in a sleeve 33secured to or formed as an integral part of an oscillatable arm 34. Thelatter extends from front to back of the box-like base-member IIparallel to and substantially intermediate the vertical side panels 2|thereof, the longitudinal axis of the sleeve 33 extending substantiallyat right angles to the arm. The rear end of the arm 34 is pivotallymounted by a pivot pin 35 in a bearing-block 36 secured to the bottom 20of the base-member, as indicated clearly in Figs. 2 and 3. The forwardor outer free end 3'! of the oscillatable arm 34 extends forwardly ofthe transverse sleeve 33 and is bifurcated to provide a vertical slot38, the spaced parallel sides of which are adapted to engage closely onopposite sides respectively of a vertical guide-rod 39, the upper andlower ends of which are fixedly secured to the platform I2 and bottom 20respectively of the base-member.

The outer free end 31 of the oscillatable arm 34 is adapted to besupported by yieldablemeans, and to this end -a collet 40 is fixedlysecured on the lower end of the guide-rod 39 and provided with anannular shoulder constituting a seat for the lower end of a coil-spring4I, the upper end of which is arranged to thrust against the undersideof a washer 42 mounted on the guide-rod and held by the force of thespring against the underside of the outer forked end 31 of theoscillatable arm. Bearing against the top of the forked end 37 of thearm and threadedly mounted on the guide-rod between the former and theunderside of the platform I2, is an adjustable tension-regulating nut43. The latter constitutes an adjustable stop for resisting upwardmovement of the outer free'end 37 of the arm due to theupwardly-directed thrust of the coil-spring II. In the same respect, byturning down the adjusting-nut 43 on the threaded end of the guide-rod,the nut. 43 also constitutes means for positively lowering the outerfree end 37 of the oscillatable arm so as to effect a proper adjustmentof the abrasive wheel 3i with respect to the platform I2, as hereinafterdescribed.

Mounted on the opposite end of the spindle 32 is an exhaust fan 44which'is adapted to lie immediately opposite the screened aperture 22 ofthe adjacent side panel 2I. When this exhaust fan 44 is rotated, it isadapted to remove dust and other light particles from the interiorof theboxlike base-member II. I

The abrasive wheel 3| and exhaust fan 44 are adapted to be driven bymeans of a pulley 45 which is secured to the spindle between theabrasive wheel and the corresponding end of the sleeve 33 and connectedby a V-belt 46 to the drive-pulley 47 Of a power source. In the presentembodiment, the latter comprises an electric motor 48, but it will beappreciated that other forms of power-supply means may be utilized. Thedirection of rotation of the pulley-belt drivemeans of the abrasiveWheel is away from the operator as the latter faces the front of themobile-unit, as indicated by the arrow in Fig. 2, as a consequence ofwhich the oscillatable arm 34 has a tendency to lift up and hence to beresiliently held by the force of the coil-spring against the undersideof the adjusting-nut 43.

It is also within the purview of the invention to include adressing-tool for truing up the periphery of the abrasive wheel. To thisend, an inverted substantially-U-shaped bracket 49 is secured to thebottom 20 of the base-member II in the vertical plane of the peripheryof the abrasive wheel. The bracket 49 is provided on its underside withan adjusting-screw 50 which extends longitudinally thereof and has aknurled head 5! at its forward end for turning the screw in the bracket.

Mounted on the screw 50 is a nut 52 having an upwardly-projecting post53 adapted to engage in a longitudinal slot in the top of the bracket.The post 53 constitutes pivotal supporting-means for the disk-shapedbase 54 of a bifurcated bracket 55 which is formed integrally with thedisk-shaped base 54 and substantially perpendicular thereto. Pivotallysupported in the substantially-vertical slot of the forked bracket 55 bya pin 56 is a pivot-block 51. The latter is provided with a transverseaperture 58 in its upper end substantially at right angles to the pivotpin 55 to receive a connecting-pin 59 for mounting a yoke-member 60 tothe pivot-block for pivotal movement in a vertical plane atsubstantially right angles to the vertical plane of the pivot-block, theyoke-member 60 having a dressing wheel BI mounted on the upper endthereof. The dressing wheel 6| is adapted thus to be movedlongitudinally to and from the periphery of the abrasive wheel, and tobe swung around to the right or left-hand sides respectively of theabrasive wheel by pivoting the base-member 54 about the post 53.Moreover, the dressing wheel 6| may be swung to and fro about the pivotpin 56 in the vertical plane of the periphery of the abrasive wheel, orin a vertical plane at right angles thereto, as explained above,suitable indices and clamping-nuts being provided, as shown in Fig. 4,for securing the dressing wheel in any of its adjusted positions. Duringthe grinding operation some relatively heavy particles of metal may beformed and to remove these from the basemember, it is proposed to mounta channel-shaped shield 62 therein immediately to the rear of theperiphery of the grinding Wheel. The shield is suitably supportedsubstantially vertically between the bottom 20 of the base-member andthe platform I2 thereof, the lower end of the shield being opposite avertical aperture 63 in the bottom 20 of the base-member. Thus, heavyparticles may be deflected by the shield through the aperture 63 ontothe ground or floor beneath the base-member.

Referring more especially to Figs. 5, 6 and 7, the platform I2 of thebox-like base-member II is provided with an aperture or slot 64 toreceive an upper peripheral portion of the abrasive wheel, the extent towhich the periphery of the abrasive wheel projects up into the slot 64.being controlled by the aforesaid adjusting-nut 43. The slot at iscoextensive with the longitudinal center-line of a recess 65 ofsubstantially-rectangular cross section formed in the top of the plat.-form [2 and extending from front to rear thereof. The recess 65 isadapted to accommodate the skate-blade guide-means and the guard-platesthereof.

The skate-blade guide-means are indicated generally at 66 and, comprisetwo flat strips of relatively-stiff steel or other suitable materialsubstantially rectangular in cross section and equal in length to thelength of the recess 65. These flat metal strips, hereinafter referredto as rails, are adapted to extend longitudinally of the recess 65 andto be supported on edge therein, the pair of rails being held in spacedparallel relationship by a plurality of rollers 61 pivotally mountedtherebetween. One roller (ii is mounted at each end respectively of thepair of rails 66 and two other rollers 81 are mounted substantiallyequidistantly between the rearmost roller and the rear end of the slot64, as indicated clearly in Fig. 4.

The pair of rails 66 and the four rollers Bl constitute a unit assemblyadapted to be supported in the recess 65 in longitudinal alignment withand directly over the slot 64 thereof. To this end, a pair of upstandingspaced parallel brackets 68 are mounted on the bottom 69 of the recess65 at opposite ends thereof respectively for supporting thecorresponding ends of the rail assembly. The fastening-means forsecuring the opposite ends of the rail assembly to the brackets E68 maybe rivets or a similar type of securingmeans, although it is preferablethat one end of the rail assembly be detachably secured to itsrespective brackets by removable fastening-means so as to enable therail assembly to be swung up about its opposite end out of the recess 65of the platform and hence facilitate adjustment and cleaning of theskate-blade sharpening-unit. cooperatively associated with the railassembly is a pair of skate-blade gripping-means Ill which constituteresilient relatively-stiff sheet-metal fingers, each finger beingsecured at one end to one of the rails flat against the vertical outsidewall thereof and at a point thereon immediately to the rear of the rearend of the slot 64. Moreover, each finger 19 is adapted to extendforwardly longitudinally of the rails and is provided on its upper edgewith a right-angle flange 1| adapted to. extend inwardly over the upperedge of the corresponding rail, each flange having a beveled leadingedge 12 and a straight edge l3 forwardly thereof. When the fingers aremounted on the respective rails, the beveled leading edges l2 cooperateto form a converging slot to guide the skate-blade into the slot formedby the cooperation of the spaced parallel straight edges E3 of thefingers. The distance between the latter is normally slightly less thanthe average width of a skate-blade so that when a skateblade is drawnbetween the spaced parallel straight edges 13, the latter will be spreadapart. slightly, the inherent resistance of the relativelystiff fingersacting to grip the skate-blade firmly therebetween. As shown clearly inFigs. 5 and 6, the spaced parallel straight edges I3 of the fingers inare disposed substantially intermediate the opposite ends of the slot 64in the top of the platform and immediately above the highest portion ofthe abrasive wheel and hence grip the skate-blade at that portionthereof which is in engagement with the abrasive wheel during thegrinding operation.

The skate-blade guide-means including the skate-blade gripping-means areadapted to be shielded by a pair of guard-plates. The latter areindicated at 14 each comprising an elongated flat sheet-steel member,the width of which is slightly less than one-half the width of therecess 65. The outer longitudinal edge of each plate is hinged at itsopposite ends respectively, as at l5, to adjacent edges of the recess sothat the plate may swing upwardly and outwardly therefrom, while theinner edge of each guardplate is adapted to be supported insubstantially the horizontal plane of the top of the platform 12 bymeans of a longitudinal vertically-depending flange 16 provided on theunderside of the guard-plate adjacent to but set back from its inneredge, the lower edge of each flange iii being adapted to engage on thebottom 69 of the recess 65. As shown clearly in Fig. 6, thespaced-parallel longitudinal inner edges of the guardplates, in thenormal position thereof, overlie the corresponding upper edges of therail assembly and cooperate to form a longitudinal slot the width ofwhich is only slightly greater than the width of a skate blade. Thus,the guard-plates prevent inadvertent damage to the skate-bladeguide-rails and gripping-fingers.

Since it is desirable to lock the guard-plates M- in operative position,each respective flange 16 thereof is provided with a pair of transverseslots ll formed at longitudinally-spaced points thereon as indicated inFig. 5, each slot being adapted to receive the outer free end of alatch-member 13. Each latch-member comprises a relativelyshort stiffpiece of sheet metal pivoted at its rear end to one end of a draw-plate19, two of which are provided in the present embodiment, each beingmounted on the bottom 69 of the recess 65 on opposite sides respectivelyof the guide-rails 8G, and more particularly in the respectivelongitudinal channels formed between the vertical flanges 76 of thecorresponding guard-plates M and the opposite substantiallyverticalwalls of the recess 65. Each draw-plate comprises an elongatedsubstantially-fiat stiff piece of sheet metal provided adjacent itsopposite ends respectively with longitudinally-extending arcuatecam-slots 80 through each of which projects a substantially-verticalguide-pin 8|. The lower end of each guide-pin is fixedly secured in thebottom 69 of the recess 65, while the upper end of each guide-pin isprovided with a flanged head 82 (see Fig. 7) adapted to engage in anaperture 83 formed in the latch-member l8 of the corresponding end ofthe draw-plate. Referring to Fig. 5, the aperture 83 of each respectivelatch-member i8 is intermediate its pivotpin and its outer free end andhence it will be clear that as each draw-plate is moved longitudinallyin its respective channel, the displacement of each cam-slot relative tothe fixed guidepins of the latches oscillates the latter so as toadvance or retract the free ends thereof into and from the respectiveslots H of the guardplate flanges l6, depending upon the direction ofmovement of the draw-plates. The simultaneous longitudinal movement ofthe latter is effected by means of a resilient bail or handle 84 securedto the rear ends of the draw-plates, the

longitudinal movement thereof being accom- 7. panied by the simultaneousinward and outward movements of the respective draw-plates due to thecoaction of their arcuate cam-slots 80 with the fixed guide-pins 8|.Moreover, since the resilient force of each arm of the Ibail 84 isdirected outwardly, the draw-plates are normally resiliently heldthereby in their outwardly-spreadapart position and resist being drawninwardly to move the high point of their cam-slots past the fixedguide-pins. Hence, the draw-plates are resiliently held at eitherextreme of their longitudinal transverse movement and resist inadvertentdisplacement therefrom.

In operating the mobile skate-sharpening unit, the motor 48 is connectedto a suitable power supply, whereupon the abrasive wheel and exhaust fanare rotated. The skater then mounts the lower platform and inserts theblade of his skate, the latter being still on his foot, between thespaced-parallel edges of the guard-plates 14 of the upper platform [2with the skate-blade resting on the rollers 61 at the far end of theplatform. The skater then draws his skate forwardly through the slotpresented by the spacedparallel edges of the guard-plates and into theleading edges of the skate-blade gripping-fingers '10. As theskate-blade enters the spaced-parallel straight edges '13 of thegripping-fingers, the blade is gripped and supported firmly thereby,while its lower edge is engaged by the upper periphery of the abrasiveWheel, which makes a longitudinal grinding cut on the bottom edge of theblade, the grinding cut beginning at the rear end of the blade andmoving to the front end thereof as the skater draws his skate from thefar end of the platform to the front end thereof. During the grindingoperation, the heavier particles of metal are conveyed out of thebasemember by the channel-shaped shield 62, which directs the heavierparticles out through the aperture 63 in the bottom thereof. Any dust orother light particles which are formed by the grinding operation aredrawn out of the box by means of the exhaust fan described above.

Since the oscillatable arm 34 is adapted to yield to pressure applied onthe periphery of the abrasive wheel, there is no possibility of thelatter gouging or forming an unusually deep cut in the skate-blade. Itshould be pointed out, moreover, that by adjusting the elevation of theabrasive wheel by means of the adjusting-nut 43, a heavy or light outmay be formed in the skateblade and that under all circumstances the cutwill be uniform, due to the constant force applied by the coil-spring 4!to the outer free end of the oscillating arm 34.

The invention may be carried out in other specific ways than thoseherein set forth without departing from th spirit and essentialcharacteristics of the invention, and the present embodiments are,therefore, to be considered in all respects as illustrative and notrestrictive, and all changes coming within the meaning and equivalencyrange of the appended claims are intended to be embraced therein.

I claim:

1. A mobile skate-sharpening device comprising: a base-member providedwith a platform having a longitudinal aperture therein; skatebladeguide-means comprising a pair of spacedparallel guide-rails secured tothe top of said platform parallel to and along opposite edgesrespectively of said longitudinal aperture, and members permanentlymounted between said guide-rails and spaced longitudinally thereof tosupport a skate-blade symmetrically of the longitudinal axis of saidaperture; hand-holds fixed to said platform; an abrasive wheel mountedon said base-member beneath said platform with a peripheral portion ofsaid abrasive wheel arranged normally to pro ect up into said aperturebetween said skate-blade guide-means and symmetrical with respect to thelongitudinal axis of said aperture; and power-means mounted on saidbase-member constructed and arranged to drive said abrasive wheel.

2. In a mobile skate-sharpening device, the combination including: abase-member provided with a platform having a longitudinal slot therein;skate-blade guide-means comprising a pair of spaced-parallel guide-railssecured to the top of said platform parallel to and along opposite edgesrespectively of said longitudinal slot; handrails fixed to saidplatform; an abrasive wheel; means to mount said abrasive wheel on saidbasemember comprising an oscillatable arm and a yieldable membercooperatively associated with said oscillatable arm normally to hold aperipheral portion of said abrasive Wheel up in the said longitudinalslot between said skate-blade guidemeans; and power-means mounted onsaid base member constructed and arranged to drive said abrasive wheel.

3. In a mobile skate-sharpening device, the combination including: abase-member provided with a platform having a longitudinal slot therein;skate-blade guide-means comprising a pair of spaced-parallel guide-railssecured to the top of said platform parallel to and along opposite edgesrespectively of said longitudinal slot; handrails fixed to saidplatform; an abrasive wheel; means to mount said abrasive wheel on saidbase-member comprising an oscillatable arm and a yieldable membercooperatively associated with said oscillatable arm normally to hold aperipheral portion of said abrasive wheel up in the said longitudinalslot between said skateblade guide-means; power-means mounted on saidbase-member constructed and arranged to drive said abrasive wheel; andadjusting-means cooperatively associated with said oscillatable arm andsaid yieldable member to limit the movement of said abrasive Wheel upinto the said longitudinal slot.

4. A mobile skate-sharpening device comprising: a base-member providedwith a platform having a longitudinal slot therein; skate-bladeguide-means comprising spaced-parallel rails secured to the top of saidplatform along opposite edges respectively of said slot, skate-bladesupporting-rollers mounted between said rails at longitudinally-spacedpoints therealong to support a skate-blade symmetrically of thelongitudinal axis of said slot, and resilient skatebladegripping-fingers secured to said guide-rails intermediate said rollers;handrails fixed to said platform; an abrasive wheel mounted on saidbase-member beneath said platform with a peripheral portion of saidabrasive wheel arranged normally to project up into said slot betweenthe spaced-parallel rails of said guide-means and symmetrical withrespect to the longitudinal axis of said slot; and power-means mountedon said base-member constructed and arranged to drive said abrasivewheel.

5. A mobile skate-sharpening device comprising: a base-member providedwith a platform having a longitudinal slot therein; skate-bladeguide-means comprising spaced-parallel rails secured to the top of saidplatform along opposite edges respectively of said slot, skate-bladesupporting-rollers mounted between said rails at longitudinally-spacedpoints silient skate-blade gripping-fingers secured to said guide-railsintermediate said rollers; handrails fixed to said platform; an abrasivewheel mounted on said base-member beneath said platform with aperipheral portion of said abrasive wheel arranged normally to projectup into said slot between the spaced-parallel rails of said guide-means;power-means mounted on said base-member constructed and arranged todrive said abrasive wheel; and longitudinal guardplates hinged to thetop of said platform in spaced-parallel relationship and on oppositesides respectively of said longitudinal slot, said guardplates beingarranged normally to overlie the upper edges of said guide-rails andsaid resilient skate-blade gripping-fingers.

6. A mobile skate-sharpening device comprising: a base-member providedwith a platform having a longitudinal slot therein; skate-bladeguide-means comprising spaced-parallel rails secured to the top of saidplatform along opposite edges respectively of said slot, skate-bladesupporting-rollers mounted between said rails at longitudinally-s acedpoints therealong, and resilient skate-blade gripping-fingers secured tosaid guide-rails intermediate said rollers; handrails fixed to saidplatform: an abrasive wheel mounted on said base-member beneath saidplatform with a peripheral portion of said abrasive wheel arrangednormally to project up into said slot between the spaced-parallel railsof said guidemeans; power-means mounted on said basemember constructedand arranged to drive said abrasive wheel; longitudinal guard-plateshinged to the top of said platform in spaced-parallel relationship andon opposite sides respectively of said longitudinal slot, saidguard-plates being arranged normally to overlie the upper edges of saidguide-rails and said resilient skate-blade gripping-fingers; andlatch-means constructed and arranged to lock and unlock said guardplatesto and from the top of said platform.

7. In a mobile skate-sharpening device, the combination including: abase-member provided with a p atform having a longitudinal slot therein;skate-blade guide-means comprising spaced parallel rails secured to thetop of said platform along opposite edges respectively of said slot,skate-b ade supporting-rollers mounted between sa d rails atlongitudinally-spaced points therei along to support a skate-bladesymmetrical y of the longitudinal axis of said slot and resilientskate-blade gripping-fingers secured to said guide-rails intermediatesaid rollers; handrails fixed. to said platform; an abrasive wheel;means to mount said abrasive wheel on said base-memb-er comprising anoscillatable arm and a yieldable member cooperatively associated withsaid arm normally to hold a peripheral portion of said abrasive wheel upin said longitudinal slot between the spaced parallel rails of saidguidemeans and symmetrical with respect to the longitudinal axis of saidslot; and power-means mounted on said base-member constructed andarranged to drive said abrasive wheel.

8. In a mobile skate-sharpening device, the combination including: abase-member provided with a platform having a longitudinal slot therein;skate-blade guide-means comprising spaced parallel rails secured to thetop of said platform therealong, and realong opposite edges respectivelyof said slot, skate-blade supporting-rollers mounted between said railsat longitudinally-spaced points therealong to support a skate-bladesymmetrically of the longitudinal axis of said slot and resilientskate-blade gripping-fingers secured to said guide-rails intermediatesaid rollers; handrails fixed to said platform; an abrasive wheel; meansto mount said abrasive wheel on said base-member comprising anoscillatable arm and a resilient member cooperatively associated withsaid arm normally to hold a peripheral portion of said abrasive wheel upin said longitudinal slot between the spaced parallel rails of saidguide-means and symmetrical with respect to the longitudinal axis ofsaid slot; power-means mounted on said basemember constructed andarranged to drive said abrasive wheel; and adjusting-means cooperativelyassociated with said oscillatable arm and said resilient member to limitthe upward movement of said abrasive wheel between the spaced parallelrails of said guide-means.

9. A mobile skate-sharpening device comprising; a base-member providedwith a platform having a longitudinal slot therein; skate-bladeguide-means comprising spaced parallel rails secured to the top of saidplatform along opposite edges respectively of said slot, skate-bladesupporting-rollers mounted between said rails at longitudinally-spacedpoints therealong and resilient skate-blade gripping-fingers secured tosaid guide-rails intermediate said rollers; an abrasive Wheel; means tomount said abrasive Wheel on said base-member comprising an oscillatablearm having a transverse rotatable spindle at the outer free end thereof,said abrasive wheel being mounted on one end of said spindle and acoil-spring arranged to support the free end of said oscillatable armnormally to resiliently hold a peripheral portion of said abrasive wheelup in the said longitudinal slot between the spaced parallel rails ofsaid guide-means; an exhaust fan mounted on the opposite end of saidtransverse spindle; powermeans mounted on said base-member constructedand arranged to drive said spindle, thereby to simultaneously rotatesaid abrasive wheel and said exhaust fan; adjusting-means cooperativelyassociated with said oscillatable arm and said coil-spring to limit theupward movement of said abrasive wheel between said spaced parallelguide-rails; and longitudinal guard-plates hinged to the top of saidplatform in spaced parallel relationship on opposite sides respectivelyof said longitudinal slot and arranged normally to overlie the upperedges of said guide-rails and said resilient skate-bladegripping-fingers.

10. A mobile skate-sharpening device comprising: a base member providedwith a platform having a longitudinal slot therein; skate-bladeguide-means comprising spaced parallel rails secured to the top of saidplatform along opposite edges respectively of said slots, skate-bladesupporting-rollers mounted between said rails at longitudinally-spacedpoints therealong and resilient skate-blade gripping-fingers secured tosaid guide-rails intermediate said rollers; an abrasive wheel; means tomount said abrasive wheel on said base-member comprising an oscillatablearm having a transverse rotatable spindle at the outer free end thereof,said abrasive wheel being mounted on one end of said spindle, and acoil-spring arranged to support the free end of said oscillatable armnormally to resiliently hold a peripheral portion of said abrasive wheelup in. the said longitudinal slot between the spaced parallel rails ofsaid guide-means; an exhaust fan mounted on the opposite end of saidtransverse spindle; power-means mounted on said basemember constructedand arranged to drive said spindle, thereby to simultaneously rotatesaid abrasive wheel and said exhaust fan; adjustingmeans cooperativelyassociated with said oscillatable arm and said coil-spring to limit theupward movement of said abrasive wheel between said spaced parallelguiderails; longitudinal guard-plates hinged to the top of said platformin spaced parallel relationship on opposite sides respectively of saidlongitudinal slot and arranged normally to overlie the upper edges ofsaid guide-rails and said resilient skate-blade gripping-fingers; andlatch-means constructed and arran 2 ged to lock and unlock saidguard-plate to and from the top of said platform.

EDWIN FRANCIS IVES.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS 10 Number

